Parts Kit, Check Valve4820-01-558-3449

NSN 4820-01-558-3449 · NIIN 015583449 · Part number 0887211 RK909CK2 2.50IN

Watts Regulator Company · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 79227

Government record, cited

NSN 4820-01-558-3449 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-558-3449. Manufacturer of record part number: 0887211 RK909CK2 2.50IN.

Also searched as 4820-01-558-3449 · 4820015583449 · NIIN 015583449 · 01-558-3449 · FSC 4820 Valves, Nonpowered · CAGE 79227 · 0887211 RK909CK2 2.50IN · RK909CK2 2.50IN · 0887211 2.50IN

Nearby stock numbers ← 4820-01-558-3446 Parts Kit, Check Valve · 4820-01-558-3528 Parts Kit, Valve Assembly →

4820-01-558-3449 — Valves, Nonpowered

Features

Parts Kit,check Valve — FSC 4820
Component Quantity: 6
End Item Source: 79227
Accessory Identifying Number: RK909CK2 PART NO.
End Item Name: VALVE ASSEMBLY
Accessory Controlling Agency: 79227
Furnished Items: DISK ASSEMBLY, SPRING, SEAT, SEAT O-RING, COVER O-RING AND LUBRICANT
3 manufacturer part numbers on file

Identification

NSN: 4820-01-558-3449
NIIN: 015583449
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 0887211 RK909CK2 2.50IN
Manufacturer: Watts Regulator Company

General Description

The Parts Kit,check Valve, cataloged under National Stock Number 4820-01-558-3449, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Watts Regulator Company. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	4820-01-558-3449
Primary Part Number	0887211 RK909CK2 2.50IN
Item Name	Parts Kit,check Valve
FSC / FSG	4820 / 48 — Valves, Nonpowered
Manufacturer	Watts Regulator Company
Status	ACTIVE
Component Quantity	6
End Item Source	79227
Accessory Identifying Number	RK909CK2 PART NO.
End Item Name	VALVE ASSEMBLY
Accessory Controlling Agency	79227
Furnished Items	DISK ASSEMBLY, SPRING, SEAT, SEAT O-RING, COVER O-RING AND LUBRICANT

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

Cross-Reference Index

Part Number	Manufacturer
RK909CK2 2.50IN	Watts Regulator Company (USA)
0887211 RK909CK2 2.50IN PRIMARY	Watts Regulator Company (USA)
0887211 2.50IN	Watts Regulator Company (USA)

No interchangeability data on file.

Other items in FSC 4820 — Valves, Nonpowered

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

4820-00-000-0097

4820-00-000-0097 · Item name not on file

4820-00-001-0010

VALVE,ROTARY,SELECTOR

4820-00-001-0020

4820-00-001-0020 · Item name not on file

4820-00-001-0021

4820-00-001-0021 · Item name not on file

4820-00-001-0032

4820-00-001-0032 · Item name not on file

4820-00-001-0037

VALVE,SAFETY RELIEF

4820-00-001-0042

4820-00-001-0042 · Item name not on file

4820-00-001-1230

4820-00-001-1230 · Item name not on file

Frequently Asked Questions

What is NSN 4820-01-558-3449?

NSN 4820-01-558-3449 is a Parts Kit,check Valve, manufactured by Watts Regulator Company, classified under FSC 4820, Valves, Nonpowered. Status: active.

What part numbers are listed for NSN 4820-01-558-3449?

NSN 4820-01-558-3449 has 3 manufacturer part numbers on file: RK909CK2 2.50IN (Watts Regulator Company), 0887211 RK909CK2 2.50IN (Watts Regulator Company), 0887211 2.50IN (Watts Regulator Company).

What are the specifications of 0887211 RK909CK2 2.50IN?

Key specifications for 0887211 RK909CK2 2.50IN: Component Quantity: 6; End Item Source: 79227; Accessory Identifying Number: RK909CK2 PART NO.; End Item Name: VALVE ASSEMBLY. 6 specifications are documented in the U.S. Government catalog.

Is NSN 4820-01-558-3449 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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